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  <title>获取字符串形式的调用栈（stack trace）</title>
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  <div id="layout-content"><div id="error.gettraceasstring" class="refentry">
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  <h1 class="refname">Error::getTraceAsString</h1>
  <p class="verinfo">(PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">Error::getTraceAsString</span> &mdash; <span class="dc-title">获取字符串形式的调用栈（stack trace）</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-error.gettraceasstring-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">final</span> <span class="modifier">public</span> <span class="methodname"><strong>Error::getTraceAsString</strong></span>(): <span class="type">string</span></div>

  <p class="para rdfs-comment">
   以字符串形式返回 stack trace。
  </p>
 </div>

 
 <div class="refsect1 parameters" id="refsect1-error.gettraceasstring-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>

 
 <div class="refsect1 returnvalues" id="refsect1-error.gettraceasstring-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   以字符串形式返回 stack trace。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-error.gettraceasstring-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-386">
    <p><strong>示例 #1 <span class="function"><strong>Error::getTraceAsString()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">test</span><span style="color: #007700">()&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;throw&nbsp;new&nbsp;</span><span style="color: #0000BB">Error</span><span style="color: #007700">;<br />}<br /><br />try&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">test</span><span style="color: #007700">();<br />}&nbsp;catch(</span><span style="color: #0000BB">Error&nbsp;$e</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">$e</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getTraceAsString</span><span style="color: #007700">();<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
#0 /home/bjori/tmp/ex.php(7): test()
#1 {main}
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-error.gettraceasstring-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="throwable.gettraceasstring.html" class="methodname" rel="rdfs-seeAlso">Throwable::getTraceAsString()</a> - 以 string 形式获取堆栈踪迹</span></li>
   </ul>
  </p>
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